Scott [41:18] is an assistant professor of motor control and learning at Long Beach University, as well as a fly fisher and podcast listener.  He has a small number of quick tests you can do at home to check your balance, and then simple exercises you can do at home without any special equipment to improve your balance in a matter of weeks.  Wading safely and comfortably on a river involves both balance and confidence, and what you learn here will give you help with both.  You'll enjoy your time on the water more.   In the Fly Box this week we have so many great tips from listeners that I may be able to retire and turn the podcast over to you.  But we also have some interesting questions that I'm happy to answer as best I can.  Some of these include: A listener suggests when a self-inflating PFD may be a good option Two listeners weigh in on how to access scientific articles on fisheries science with paying a fee for access A listener offers a great suggestion on how to easily attach a dropper to the bend of a hook. Should I be concerned about fishing below a sewage treatment outlet? A listener tells a great tale of his momentous catch on one of the new Helios rods Should I be concerned about angling for fish when they are on their spawning run? With the new Helios rods, do you still prefer the F version for trout and the D version for salt water? If I dispose of the shiners I catch will it help the local trout population? What do you think of using an indicator with a big nymph or crayfish fly for early season smallmouth? Can you explain the difference between a shooting head and a sink-tip line? A listener gives some expert advice on the choice of insect repellents I am having trouble with short roll casts.  Do you think it's my casting technique? Is it helpful to pre-treat dry flies right after you tie them? If I fish an indicator and split shot and a nymph, should I use a double taper or weight-forward line?